Dr. Donald L. Jernigan, born Jan. 4, 1945, in Stephenville, Texas, passed away on Saturday, March 7, 2020. Don, as he was known, died from complications of a long illness with his beloved wife Sharon and daughters Jill and Jana by his side.

Don grew up in Texas. Raised in a Baptist family and the son of a Texas rancher and a schoolteacher, he learned at an early age that there was no substitute for hard work. He was a standout athlete and his involvement in athletics taught him the importance of teamwork, and as a team captain, he learned the value of good leadership.

After high school, Don attended and graduated from the University of Texas at Arlington, earning a bachelor’s degree in chemistry. Soon after, he enlisted in the U.S. Navy Medical Service Corps, serving as a deputy officer at Bethesda Naval Hospital in Bethesda, Maryland. After his time as a serviceman, Don earned a PhD in physical chemistry from Baylor University, and went on to work as chairman of the chemistry department at the University of Mary Hardin-Baylor. He spent the next 10 years working in higher education.

In 1982, Don joined Adventist Health System (now AdventHealth) as administrator for a multi-specialty group practice in Texas.

Don became known for his principled leadership and commitment to Christian values. He served AdventHealth for 35 years and retired as its president and CEO in 2016. A faithful steward, he led physicians, hospitals, regions and ultimately a complex and sophisticated healthcare system with a purpose that superseded bottom-line metrics and always focused on people.

During his decade-long tenure as CEO, the organization experienced steady growth and expanded its footprint across the country. Always focused on the mission of Extending the Healing Ministry of Christ, Don fostered a culture of service that grew leaders and employees who share a passion for delivering whole-person, Christian healthcare.

After retiring as CEO, he embraced his role as a founding faculty member of the AdventHealth Leadership Institute. His relentless focus on Christian principles in leadership and faith-based practical and experiential guidance helped many leaders hone strategic skills.

Don embodied stewardship, driving AdventHealth to be an efficient and effective organization, fulfilling its mission and vision while wisely utilizing the limited resources of time, money and energy. He authored The Hidden Power of Relentless Stewardship, a book with far-reaching impact on many leaders.

Don was a prominent speaker on issues of leadership, healthcare, science, education and the military.

He was also a Diplomat of the American College of Healthcare Executives and served as a member of the board of trustees for the Sanford-Burnham Medical Research Institute and a member of the Governor’s Council of the Metro Orlando Economic Development Commission.

Don gave generously to many organizations including the Seventh-day Adventist Church, Grace Medical Home and United Way. Under his leadership, AdventHealth launched its corporate community involvement program to improve the health, prosperity and well-being of its communities, as the Bible instructs in Jeremiah: “Seek the peace and prosperity of the city to which I have carried you… because if it prospers, you too will prosper” (Jer. 29:7).

Don was a member of the Spring Meadows Seventh-day Adventist Church. He is survived by his beloved wife of 41 years, Sharon; his daughters, Jill and Jana; their husbands, Richard and Tim; grandchildren, Hartlea, Gavin and Garrett; and Garrett’s wife, Angela.

Don will be buried in Belton, Texas, with a private graveside service. A celebration of his life will be held in central Florida at a later date.

In honor of Don, and in lieu of flowers, donations may be made to the AdventHealth Leadership Institute with checks payable to:


900 Hope Way

Altamonte Springs, FL 32714

Attention: Leadership Institute


Information provided by AdventHealth